JP6025170B2

JP6025170B2 - Anti-levitation manhole

Info

Publication number: JP6025170B2
Application number: JP2012272997A
Authority: JP
Inventors: 大平　聡; 聡大平
Original assignee: Haneda Zenith Co Ltd
Current assignee: Haneda Zenith Co Ltd
Priority date: 2012-12-14
Filing date: 2012-12-14
Publication date: 2016-11-16
Anticipated expiration: 2032-12-14
Also published as: JP2014118706A

Description

本発明は、直壁管の上部に斜壁管、調整リング、蓋受枠及び開閉蓋を順に積層して構成したマンホールにおいて、地震時等に発生する液状化現象によりマンホールの浮き上がりを防止する浮上防止マンホールに関するものである。 The present invention is a manhole in which a slant wall tube, an adjustment ring, a lid receiving frame, and an open / close lid are sequentially laminated on the upper part of a straight wall tube, and prevents the manhole from rising due to a liquefaction phenomenon that occurs during an earthquake or the like. It is about manholes.

１９９５年１月１７日に発生した阪神淡路大震災や２０１１年３月１１日に発生した東日本大震災等では、液状化により管路が蛇行するなどの被害を受け、特にマンホールが多数浮上したことが報告された。マンホールの浮上は、下水道管路としての機能を損なうばかりでなく、路面に突出したマンホールは道路交通に支障をきたし、特に緊急車両の通行の妨げになる。そのため、地震時の液状化現象によりマンホールが浮き上がらない地震対策が急務となっている。 In the Great Hanshin-Awaji Earthquake that occurred on January 17, 1995, the Great East Japan Earthquake that occurred on March 11, 2011, etc., it was reported that pipes meandered due to liquefaction, and many manholes emerged in particular. It was done. The rise of the manhole not only impairs the function as a sewer pipe, but the manhole protruding on the road surface impedes road traffic, and in particular impedes the passage of emergency vehicles. Therefore, there is an urgent need for earthquake countermeasures that prevent manholes from rising due to liquefaction during an earthquake.

例えば、特許文献１には、特殊な蓋受け枠によって円形の重量構造物を支持し、地中に埋設することが記載されている。また、特許文献２には、調整リングを外側に張り出してその下部に円形の重量構造物を固定して地中に埋設することが記載されている。また、特許文献３には、斜壁管の外周に鋼製バンドを取り付け、その上部に非接触で円形の重量構造物を配置したことが記載されている。また、特許文献４には、方形状の重量構造物を斜壁管の外周に挿通し、マンホールとの隙間にアスファルト充填剤を充填したことが記載されている。 For example, Patent Document 1 describes that a circular heavy structure is supported by a special lid receiving frame and embedded in the ground. Further, Patent Document 2 describes that an adjustment ring projects outward and a circular heavy structure is fixed to the lower part of the adjustment ring and embedded in the ground. Patent Document 3 describes that a steel band is attached to the outer periphery of the inclined wall tube, and a non-contact circular weight structure is disposed on the upper portion thereof. Further, Patent Document 4 describes that a square-shaped heavy structure is inserted into the outer periphery of the slanted wall tube and an asphalt filler is filled in the gap with the manhole.

特開２０１０−０７０９３５号公報JP 2010-070935 A 特開２０１１−０１２４３３号公報JP 2011-012433 A 特開２０１２−１８８８８９号公報JP 2012-188889 A 実用新案登録第３１４７６２６号公報Utility Model Registration No. 3147626

しかしながら、特許文献１〜３で採用される円形の重量構造物では、同一面積の方形状と比べて設置幅が大きくなるため設置し得る路肩からの位置が制限されてしまうという問題がある。また、特許文献１、２では特殊な構造の蓋受け枠や鋼製バンドを別途用意する必要があるため材料費がコストアップになるという問題がある。 However, the circular weight structure employed in Patent Documents 1 to 3 has a problem that the position from the road shoulder that can be installed is limited because the installation width is larger than that of a square shape having the same area. Further, Patent Documents 1 and 2 have a problem that the material cost is increased because it is necessary to separately prepare a lid receiving frame and a steel band having a special structure.

また、特許文献４では方形状の重量構造物の長手方向が道路に平行に配置できる場合は、路肩から近い場所にも設置できるものの、マンホール内のステップが歩道側に設置される場合やマンホールに接続される流出管に角度が設定されている場合には斜壁管の設置角度が異なり、斜壁管の設置角度に応じて方形状の重量構造物の長手方向も種々の方向に配置されるため重量構造物が道路の幅員幅内に収まらなくなるといった問題があった。 Also, in Patent Document 4, when the longitudinal direction of the square heavy structure can be arranged parallel to the road, it can be installed near the shoulder of the road, but when the steps in the manhole are installed on the sidewalk side or in the manhole When the angle is set to the outflow pipe to be connected, the installation angle of the inclined wall pipe is different, and the longitudinal direction of the rectangular heavy structure is also arranged in various directions according to the installation angle of the inclined wall pipe. For this reason, there is a problem that the heavy structure does not fit within the width of the road.

本発明は前記課題を解決するものであり、その目的とするところは、本来のマンホールを構成する調整リングを浮上防止用部材とすることで部品点数を増やすことなく、錘部の配置角度を所望の方向に移動可能とした浮上防止マンホールを提供するものである。 SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems, and the object of the present invention is to provide an adjustment angle of the weight part without increasing the number of parts by using an adjustment ring that constitutes the original manhole as a floating prevention member. It is intended to provide an ascent prevention manhole that can be moved in the direction of.

前記目的を達成するための本発明に係る浮上防止マンホールの第１の構成は、直壁管の上部に斜壁管、調整リング、蓋受枠及び開閉蓋を順に積層して構成した浮上防止マンホールにおいて、前記斜壁管は、該斜壁管の上部に突出して設けられた複数のアンカーボルトを有し、前記調整リングは、前記斜壁管上に載置される平板部と、前記平板部を貫通すると共に、円弧状で所定の長さを有し、前記アンカーボルトが移動可能に挿通される複数の長穴と、前記平板部の外周縁に設けられ、該平板部の厚さよりも大きな厚さを有する錘部と、を有し、前記斜壁管上に載置される前記調整リングが前記平板部を貫通する長穴内に前記アンカーボルトが挿通された状態で該長穴に沿って回転可能に設けられ、前記平板部と前記錘部とは連結部材を介して着脱可能に設けられ、前記平板部は外形が円盤状で構成され、該平板部の外周縁に沿って前記連結部材を係止する複数の係止部が所定ピッチで設けられ、前記長穴の円弧状の長さは、３６０度を前記係止部の数で除した角度の範囲に設定されたことを特徴とする。 In order to achieve the above object, the first configuration of the ascent prevention manhole according to the present invention is an ascent prevention manhole constructed by laminating a slant wall pipe, an adjustment ring, a lid receiving frame and an opening / closing lid in this order on the straight wall pipe. The slant wall tube has a plurality of anchor bolts protruding from the top of the slant wall tube, and the adjustment ring includes a flat plate portion mounted on the slant wall tube, and the flat plate portion. A plurality of elongated holes that pass through, have an arc shape, have a predetermined length, and are movably inserted through the anchor bolts, and are provided on the outer peripheral edge of the flat plate portion, and have a thickness larger than the thickness of the flat plate portion. A weight portion having a thickness, and the adjustment ring placed on the inclined wall tube rotates along the elongated hole in a state where the anchor bolt is inserted into the elongated hole penetrating the flat plate portion. capable provided, via the connecting member and the flat plate portion and the weight portion The flat plate portion is configured to be detachable, and the outer shape of the flat plate portion is formed in a disc shape. A plurality of locking portions for locking the connecting member along the outer peripheral edge of the flat plate portion are provided at a predetermined pitch. The length of the arc shape is set to an angle range obtained by dividing 360 degrees by the number of the locking portions .

また、本発明に係る浮上防止マンホールの第２の構成は、直壁管の上部に斜壁管、調整リング、蓋受枠及び開閉蓋を順に積層して構成した浮上防止マンホールにおいて、前記斜壁管は、該斜壁管の上部に突出して設けられた複数のアンカーボルトを有し、前記調整リングは、前記斜壁管上に載置される平板部と、前記平板部を貫通すると共に、円弧状で所定の長さを有し、前記アンカーボルトが移動可能に挿通される複数の長穴と、前記平板部の外周縁に設けられ、該平板部の厚さよりも大きな厚さを有する錘部と、を有し、前記斜壁管上に載置される前記調整リングが前記平板部を貫通する長穴内に前記アンカーボルトが挿通された状態で該長穴に沿って回転可能に設けられ、前記平板部と前記錘部とは連結部材を介して着脱可能に設けられ、前記平板部の外周縁に前記連結部材を介して複数の前記錘部が着脱可能に設けられ、該複数の錘部は前記平板部を中心にして折曲した状態で配置されることを特徴とする。 A second configuration of the ascent prevention manhole according to the present invention is the ascent prevention manhole in which the slant wall tube, the adjustment ring, the lid receiving frame, and the open / close lid are sequentially laminated on the top of the straight wall tube. Has a plurality of anchor bolts provided protruding from the upper portion of the inclined wall tube, and the adjustment ring passes through the flat plate portion placed on the inclined wall tube, the flat plate portion, and a circular shape. A plurality of elongated holes that are arc-shaped and have a predetermined length and are inserted through the anchor bolts in a movable manner, and a weight portion that is provided on the outer peripheral edge of the flat plate portion and has a thickness larger than the thickness of the flat plate portion And the adjustment ring placed on the inclined wall tube is rotatably provided along the elongated hole in a state where the anchor bolt is inserted into the elongated hole penetrating the flat plate portion. The flat plate portion and the weight portion are detachably provided via a connecting member. The via the connecting member to the outer periphery of the flat plate portion a plurality of said weight section are detachably provided, wherein the weight portion of said plurality of which are arranged in a state of being bent around the said plate And

また、本発明に係る浮上防止マンホールの第３の構成は、前記第１、第２の構成において、前記平板部及び錘部を含む全体平面形状が前記直壁管の外径よりも大きな外形を有する略方形状で形成されたことを特徴とする。 Further, the third configuration of the levitation preventing manhole according to the present invention is the first and second configurations, wherein the overall planar shape including the flat plate portion and the weight portion is larger than the outer diameter of the straight wall tube. It is characterized by having a substantially square shape.

本発明に係る浮上防止マンホールの第１の構成によれば、斜壁管の上部に突出して設けられた複数のアンカーボルトに長穴を挿通して調整リングの平板部を斜壁管上に載置し、マンホールの設置位置に応じてアンカーボルトに長穴を係合させながら調整リングの平板部の配置方向を移動することが出来る。これにより平板部に取り付けられる錘部の配置角度を所望の方向に移動することが出来る。 According to the first configuration of the levitation preventing manhole according to the present invention, the elongated holes are inserted into the plurality of anchor bolts protruding from the upper portion of the inclined wall tube, and the flat plate portion of the adjustment ring is mounted on the inclined wall tube. It is possible to move the arrangement direction of the flat plate portion of the adjustment ring while engaging the elongated hole with the anchor bolt according to the installation position of the manhole. Thereby, the arrangement | positioning angle of the weight part attached to a flat plate part can be moved to a desired direction.

また、連結部材により平板部と錘部とを固定したり分離することが出来、錘部が大きな重量を有する場合にも輸送や設置作業が容易に出来る。 Further, it is possible to fix or separate the flat portion and the weight portion by consolidated member, the weight unit is also transportation and installation work can be easily when it has a large weight.

また、平板部の外周縁に沿って設けた所定ピッチの係止部の数に対応して長穴の円弧状の長さを設定することにより、３６０度の所望の角度に錘部を配置することが出来る。 Further, by setting the arcuate length of several correspondingly long hole in the engaging portion of a predetermined pitch which is provided along the outer peripheral edge of the flat plate portion, arranged spindle unit to a desired angle of 360 degrees I can do it.

また、本発明に係る浮上防止マンホールの第２の構成によれば、道路の変曲点に応じて種々の角度で一対の錘部を平板部を中心に折り曲げて設置することが容易に出来る。 Moreover, according to the 2nd structure of the levitation prevention manhole which concerns on this invention, it can be easily installed by bending a pair of weight part centering | focusing on a flat plate part at various angles according to the inflection point of a road.

また、本発明に係る浮上防止マンホールの第３の構成によれば、平面上で同じ面積を有する場合でも設置幅を小さくすることが出来、設置し得る路肩からの位置が制限されることもない。 Moreover, according to the 3rd structure of the anti-levitation manhole which concerns on this invention, even when it has the same area on a plane, an installation width can be made small and the position from the road shoulder which can be installed is not restrict | limited. .

（ａ）は本発明に係る浮上防止マンホールの構成を示す断面説明図、（ｂ）は（ａ）の蓋と蓋受枠を省略した平面説明図である。(A) is sectional explanatory drawing which shows the structure of the levitation prevention manhole which concerns on this invention, (b) is plane explanatory drawing which abbreviate | omitted the cover and lid receiving frame of (a). （ａ）は本発明に係る浮上防止マンホールの調整リングの構成を示す平面図説明図、（ｂ）は（ａ）のＡ−Ａ矢視断面図である。(A) is a top view explanatory drawing which shows the structure of the adjustment ring of the anti-levitation manhole which concerns on this invention, (b) is AA arrow sectional drawing of (a). （ａ）は本発明に係る浮上防止マンホールの調整リングの平板部の構成を示す平面図説明図、（ｂ）は（ａ）のＢ−Ｂ矢視断面図、（ｃ）は（ａ）のＣ−Ｃ矢視断面図である。(A) is a top view explanatory drawing which shows the structure of the flat plate part of the adjustment ring of the levitation prevention manhole which concerns on this invention, (b) is BB arrow sectional drawing of (a), (c) is (a). It is CC sectional view taken on the line. （ａ）は本発明に係る浮上防止マンホールの調整リングの錘部の構成を示す平面図説明図、（ｂ）は（ａ）のＤ−Ｄ矢視断面図である。(A) is a top view explanatory drawing which shows the structure of the weight part of the adjustment ring of the levitation prevention manhole which concerns on this invention, (b) is DD sectional view taken on the line of (a). 調整リングの一対の錘部を平板部を中心に折り曲げて道路の変曲点に設置した様子を示す平面説明図である。It is plane explanatory drawing which shows a mode that a pair of weight part of the adjustment ring was bent centering on the flat plate part, and it installed in the inflection point of the road.

図により本発明に係る浮上防止マンホールの一実施形態を具体的に説明する。 An embodiment of the ascent prevention manhole according to the present invention will be described in detail with reference to the drawings.

図１において、１は地盤２内に埋設されるコンクリート製筒状管からなるマンホール１であり、底版３の上部に順次、直壁管４，５が積層され、更に直壁管５の上部に斜壁管６、調整リング７が順次積層される。調整リング７の上部には補強用鋼板15が一体的に埋設されており、該補強用鋼板15の上部には蓋受枠10が積層され、該蓋受枠10の上部には開閉蓋11が積層される。直壁管４には排水管12が接続されている。 In FIG. 1, reference numeral 1 denotes a manhole 1 made of a concrete cylindrical pipe embedded in the ground 2, and straight wall pipes 4 and 5 are sequentially laminated on the upper part of the bottom plate 3, and further on the upper part of the straight wall pipe 5. The slant wall tube 6 and the adjustment ring 7 are sequentially laminated. A reinforcing steel plate 15 is integrally embedded in the upper portion of the adjustment ring 7. A lid receiving frame 10 is laminated on the upper portion of the reinforcing steel plate 15, and an opening / closing lid 11 is laminated on the upper portion of the lid receiving frame 10. The A drain pipe 12 is connected to the straight wall pipe 4.

斜壁管６の上部には天面６ａから突出する複数のアンカーボルト８が設けられている。本実施形態のアンカーボルト８は図１（ｂ）に示すように、同一円周上に１２０度ずつずれた位置で３つのアンカーボルト８が斜壁管６の天面６ａから突出して設けられた一例である。 A plurality of anchor bolts 8 projecting from the top surface 6a are provided on the upper portion of the inclined wall tube 6. As shown in FIG. 1B, the anchor bolt 8 of this embodiment is provided with three anchor bolts 8 protruding from the top surface 6a of the inclined wall tube 6 at positions shifted by 120 degrees on the same circumference. It is an example.

本実施形態の調整リング７は、斜壁管６の天面６ａ上（斜壁管上）に載置される外形が円盤状の平板部９と、該平板部９を貫通すると共に、斜壁管６の開口外形に対応する形状で所定の長さを有し、アンカーボルト８が移動可能に挿通される複数の長穴13と、平板部９の外周縁に設けられ、該平板部９の厚さよりも大きな厚さを有する一対の錘部14を有して構成される。 The adjustment ring 7 according to the present embodiment includes a flat plate portion 9 whose outer shape is placed on the top surface 6a (on the inclined wall tube) of the slant wall tube 6 and the flat plate portion 9, and the slant wall. A plurality of elongated holes 13 having a predetermined length in a shape corresponding to the outer shape of the opening of the tube 6 and through which the anchor bolt 8 is movably inserted, and provided on the outer peripheral edge of the flat plate portion 9, A pair of weight portions 14 having a thickness larger than the thickness is provided.

図２に示すように、調整リング７の平板部９の上面には円盤状の補強用鋼板15が接合されている。補強用鋼板15は調整リング７の平板部９のコンクリート本体が完成した後にエポキシ樹脂等の接着剤により接着するか、或いは図示しないボルト接合等によりコンクリート本体と一体化される。尚、調整リング７の平板部９のコンクリート本体に補強用鋼板15を接合しないで該調整リング７の平板部９をコンクリート成型品のみで構成することでも良い。 As shown in FIG. 2, a disk-shaped reinforcing steel plate 15 is joined to the upper surface of the flat plate portion 9 of the adjustment ring 7. The reinforcing steel plate 15 is bonded with an adhesive such as an epoxy resin after the concrete body of the flat plate portion 9 of the adjusting ring 7 is completed, or is integrated with the concrete body by a bolt joint or the like (not shown). Alternatively, the flat plate portion 9 of the adjustment ring 7 may be formed of only a concrete molded product without joining the reinforcing steel plate 15 to the concrete body of the flat plate portion 9 of the adjustment ring 7.

本実施形態の調整リング７は平板部９の厚さによりマンホール１の高さ及び角度を調整すると共に、該平板部９の外周縁に連結部材16を介して固定される重量構造物からなる一対の錘部14によりマンホール１の浮上防止機能を兼ね備える。 The adjustment ring 7 of this embodiment adjusts the height and angle of the manhole 1 according to the thickness of the flat plate portion 9, and is a pair of heavy structures fixed to the outer peripheral edge of the flat plate portion 9 via a connecting member 16. The weight part 14 also has the function of preventing the manhole 1 from floating.

本実施形態の調整リング７の平板部９を貫通して設けられた長穴13は、図３に示すように、斜壁管６の天面６ａから突出して設けられたアンカーボルト８の位置に対応して同一円周上に１２０度ずつずれた位置でその円周中心を中心として３０度の角度幅に対応する長さを有して構成される。 As shown in FIG. 3, the long hole 13 provided through the flat plate portion 9 of the adjustment ring 7 of the present embodiment is positioned at the position of the anchor bolt 8 provided so as to protrude from the top surface 6 a of the inclined wall tube 6. Correspondingly, it is configured to have a length corresponding to an angular width of 30 degrees around the center of the circumference at a position shifted by 120 degrees on the same circumference.

調整リング７の平板部９と一対の錘部14とは断面Ｌ字形状の連結部材16を用いて着脱可能に設けられている。本実施形態の平板部９は図３に示すように、中央部に斜壁管６の上部開口径に対応する径を有する開口部９ａが設けられた円盤状で構成されており、該平板部９の外周縁近傍には、円盤状の平板部９の円周中心を中心にとして同一円周上に３０度ずつ所定ピッチでずれた位置に貫通穴９ｂが１２個設けられている。 The flat plate portion 9 and the pair of weight portions 14 of the adjustment ring 7 are detachably provided using a connecting member 16 having an L-shaped cross section. As shown in FIG. 3, the flat plate portion 9 of the present embodiment is formed in a disc shape in which an opening 9 a having a diameter corresponding to the upper opening diameter of the slant wall tube 6 is provided at the center portion. In the vicinity of the outer peripheral edge 9, twelve through-holes 9 b are provided at positions shifted by 30 degrees on the same circumference about the center of the circumference of the disk-shaped flat plate portion 9 by a predetermined pitch.

貫通穴９ｂは、平板部９の外周縁に沿って連結部材16を係止する複数の係止部として構成される。これに対応して、長穴13の円弧状の長さは、円盤状の平板部９の一周である３６０度を貫通穴９ｂの数で除した角度の範囲に設定される。 The through hole 9 b is configured as a plurality of locking portions that lock the connecting member 16 along the outer peripheral edge of the flat plate portion 9. Correspondingly, the arc-shaped length of the long hole 13 is set to an angle range obtained by dividing 360 degrees, which is one round of the disk-shaped flat plate portion 9, by the number of the through holes 9b.

即ち、図３に示す一例では、円盤状の平板部９の一周である３６０度を貫通穴９ｂの数の１２個で除した角度となる３０度（３６０度／１２＝３０度）の範囲に長穴13の円弧状の長さが設定される。例えば、図示しないが、貫通穴９ｂの数が６個に設定された場合には、円盤状の平板部９の一周である３６０度を貫通穴９ｂの数の６個で除した角度となる６０度（３６０度／６＝６０度）の範囲に長穴13の円弧状の長さが設定される。 In other words, in the example shown in FIG. 3, the angle is 360 degrees (360 degrees / 12 = 30 degrees), which is an angle obtained by dividing 360 degrees, which is the circumference of the disk-shaped flat plate portion 9, by 12 pieces of the number of through holes 9b. The arcuate length of the long hole 13 is set. For example, although not shown, when the number of through holes 9b is set to 6, the angle obtained by dividing 360 degrees, which is one round of the disk-shaped flat plate portion 9, by 6 of the number of through holes 9b is 60. The arcuate length of the long hole 13 is set in a range of degrees (360 degrees / 6 = 60 degrees).

これにより、所望のアンカーボルト８に所望の長穴13を挿通して係合させた状態で斜壁管６上に載置して平板部９を所望の方向に回転させることが出来、更に所望の貫通穴９ｂを選択して連結部材16を介して錘部14を装着することにより、錘部14の延長方向を所望の角度に設定することが出来る。 As a result, the flat plate portion 9 can be rotated in a desired direction by being placed on the inclined wall tube 6 in a state where the desired long hole 13 is inserted into and engaged with the desired anchor bolt 8. By selecting the through hole 9b and attaching the weight portion 14 via the connecting member 16, the extending direction of the weight portion 14 can be set to a desired angle.

一方、本実施形態の錘部14には、図４に示すように、平板部９を受ける断面Ｌ字形状で平面円弧状の段部からなるガイド溝部14ａが設けられており、該ガイド溝部14ａに円盤状の平板部９の外周縁を移動自在に嵌合し得るように構成される。 On the other hand, as shown in FIG. 4, the weight portion 14 of the present embodiment is provided with a guide groove portion 14a composed of a stepped portion having an L-shaped cross section for receiving the flat plate portion 9 and a plane arc shape, and the guide groove portion 14a. It is comprised so that the outer periphery of the disk shaped flat plate part 9 can be fitted movably.

ガイド溝部14ａには、円弧状のガイド溝部14ａの円弧中心を中心にとして同一円弧上に３０度ずつずれた位置にインサートナット17が５個設けられている。また、そのインサートナット17に隣接してガイド溝部14ａの外側には、該ガイド溝部14ａの円弧中心から各インサートナット17の中心を通る直線上にインサートナット18が同じくガイド溝部14ａの円弧中心を中心にとして同一円弧上に３０度ずつずれた位置に３個設けられている。 Five insert nuts 17 are provided in the guide groove portion 14a at positions shifted by 30 degrees on the same arc around the arc center of the arc-shaped guide groove portion 14a. Further, on the outside of the guide groove portion 14a adjacent to the insert nut 17, the insert nut 18 is also centered on the arc center of the guide groove portion 14a on a straight line passing through the center of each insert nut 17 from the arc center of the guide groove portion 14a. Three are provided at positions shifted by 30 degrees on the same arc.

そして、一対の錘部14のガイド溝部14ａに平板部９の外周縁を嵌合して該ガイド溝部14ａに埋設されたインサートナット17と平板部９の外周縁部に設けた貫通穴９ｂとの位置合わせを行し、連結部材16に設けられた一方の取付穴から固定ボルト19を挿入して平板部９の貫通穴９ｂに挿通し、錘部14のガイド溝部14ａに設けたインサートナット17に螺合締結する。更に、連結部材16に設けられた他方の取付穴から固定ボルト20を挿入して錘部14のガイド溝部14ａの外側に設けたインサートナット18に螺合締結する。 Then, the outer peripheral edge of the flat plate portion 9 is fitted into the guide groove portion 14a of the pair of weight portions 14, and the insert nut 17 embedded in the guide groove portion 14a and the through hole 9b provided in the outer peripheral edge portion of the flat plate portion 9 are provided. Alignment is performed, a fixing bolt 19 is inserted from one mounting hole provided in the connecting member 16 and is inserted into the through hole 9b of the flat plate portion 9, and the insert nut 17 provided in the guide groove portion 14a of the weight portion 14 is inserted. Fasten with screws. Further, the fixing bolt 20 is inserted from the other mounting hole provided in the connecting member 16 and screwed and fastened to the insert nut 18 provided outside the guide groove portion 14a of the weight portion 14.

これにより、図２に示すように、平板部９と一対の錘部14とを固定して調整リング７を組み立てることが出来る。調整リング７は、平板部９及び一対の錘部14を含む全体平面形状が直壁管４，５の外形よりも大きな外形を有する略方形状で形成されている。 Thereby, as shown in FIG. 2, the adjustment ring 7 can be assembled by fixing the flat plate portion 9 and the pair of weight portions 14. The adjustment ring 7 is formed in a substantially rectangular shape in which the entire planar shape including the flat plate portion 9 and the pair of weight portions 14 has an outer shape larger than the outer shape of the straight wall tubes 4 and 5.

尚、本実施形態では、図２（ａ）に示すように、平板部９と一対の錘部14とが分割可能に構成されているため錘部14自体は１枚の方形状ではないが、長手方向中央部に多少の凹部が形成される場合であっても平板部９及び一対の錘部14を含む全体平面形状が略方形状で構成されているものと定義する。 In the present embodiment, as shown in FIG. 2 (a), the flat plate portion 9 and the pair of weight portions 14 are configured to be separable, so the weight portion 14 itself is not a single rectangular shape. Even if some concave portions are formed in the central portion in the longitudinal direction, it is defined that the entire planar shape including the flat plate portion 9 and the pair of weight portions 14 is formed in a substantially rectangular shape.

そして、図１（ａ）に示すように、底版３上に直壁管４を載置して該直壁管４の側面に排水管12を連結し、該直壁管４の上部に直壁管５を載置する。更に、直壁管５上に斜壁管６を載置する。そして、斜壁管６の天面６ａ上に突出したアンカーボルト８と、調整リング７の平板部９に形成された長穴13とを位置合わせして該調整リング７の長手方向が所望の位置になるように配置してアンカーボルト８を長穴13に挿通させて調整リング７を斜壁管６の天面６ａ上に載置する。このとき、斜壁管６の天面６ａ上（斜壁管上）に載置される調整リング７が平板部９を貫通する円弧状の長穴13内（長穴内）にアンカーボルト８が挿通された状態で該長穴13に沿って回転可能に設けられる。 Then, as shown in FIG. 1A, a straight wall pipe 4 is placed on the bottom plate 3, a drain pipe 12 is connected to a side surface of the straight wall pipe 4, and a straight wall is placed above the straight wall pipe 4. Place the tube 5. Further, the inclined wall tube 6 is placed on the straight wall tube 5. Then, the anchor bolt 8 projecting on the top surface 6a of the inclined wall tube 6 and the elongated hole 13 formed in the flat plate portion 9 of the adjustment ring 7 are aligned so that the longitudinal direction of the adjustment ring 7 is a desired position. Then, the anchor bolt 8 is inserted into the elongated hole 13 and the adjustment ring 7 is placed on the top surface 6 a of the inclined wall tube 6. At this time, the anchor bolt 8 is inserted into the arc-shaped elongated hole 13 (inside the elongated hole) through which the adjusting ring 7 placed on the top surface 6a of the inclined wall tube 6 (on the inclined wall tube) passes through the flat plate portion 9. In this state, it is rotatably provided along the elongated hole 13.

平板部９の外周縁近傍に円盤状の平板部９の円周中心を中心にして同一円周上に３０度ずつずれた位置に１２個設けられた貫通穴９ｂと、平板部９の円周中心を中心にして同一円周上に１２０度ずつずれた位置でその円周中心を中心として３０度の角度幅に対応する長さを有する３個の長穴13との組み合わせにより、所望のアンカーボルト８に所望の長穴13を挿通して係合させた状態で斜壁管６上に平板部９を該長穴13に沿って回転可能に載置し、所望の貫通穴９ｂを選択して連結部材16を介して錘部14の延長方向を所望の方向に配置して固定することが出来る。 12 through-holes 9b provided in the vicinity of the outer peripheral edge of the flat plate portion 9 at positions shifted by 30 degrees on the same circumference around the circumference center of the disc-shaped flat plate portion 9, and the circumference of the flat plate portion 9 A desired anchor is obtained by combining three elongated holes 13 having a length corresponding to an angular width of 30 degrees around the center of the circumference at a position shifted by 120 degrees on the same circumference around the center. With the desired long hole 13 inserted into and engaged with the bolt 8, the flat plate portion 9 is placed on the inclined wall tube 6 so as to be rotatable along the long hole 13, and the desired through hole 9b is selected. Thus, the extending direction of the weight portion 14 can be arranged and fixed in a desired direction via the connecting member 16.

更に、アンカーボルト８に蓋受枠10に設けられた貫通孔に挿通して調整リング７上に蓋受枠10を載置して該アンカーボルト８の雄ねじ部にナット21を螺合締結して斜壁管６、調整リング７、蓋受枠10を一体的に相互に連結固定する。 Further, the anchor bolt 8 is inserted into a through-hole provided in the lid receiving frame 10, the lid receiving frame 10 is placed on the adjustment ring 7, and a nut 21 is screwed and fastened to the male thread portion of the anchor bolt 8. The tube 6, the adjustment ring 7, and the lid receiving frame 10 are integrally connected and fixed to each other.

尚、調整リング７の全体平面形状は方形状以外にも円形状や他の種々の形状であっても良い。 The overall planar shape of the adjustment ring 7 may be a circular shape or other various shapes other than the square shape.

本実施形態では、地盤２の地表面で調整リング７の上面には舗装層22が設けられており調整リング７の上面に対して舗装層22による反力が働くことによりマンホール１の浮上がより効果的に防止される。尚、錘部14がマンホール１の浮上を防止し得る十分な重量を有する場合には調整リング７の上面に舗装層22が無くても良い。 In the present embodiment, a pavement layer 22 is provided on the upper surface of the adjustment ring 7 on the ground surface of the ground 2, and the reaction force by the pavement layer 22 acts on the upper surface of the adjustment ring 7 so that the manhole 1 is more lifted. Effectively prevented. If the weight portion 14 has a sufficient weight that can prevent the manhole 1 from floating, the pavement layer 22 may not be provided on the upper surface of the adjustment ring 7.

既設マンホールに設置した既設の調整リングを取り外して本実施形態の調整リング７に取り替える場合には、調整リング７の錘部14の下面の高さ位置まで地盤２を掘削した後、ナット21を外して蓋受枠10、図示しないモルタルやグラウト層、調整ワッシャ及び既設の調整リングを撤去し、必要に応じて斜壁管６の天面６ａ上にアンカーボルト８を埋設する。 When the existing adjustment ring installed in the existing manhole is removed and replaced with the adjustment ring 7 of the present embodiment, the nut 21 is removed after excavating the ground 2 to the height of the lower surface of the weight portion 14 of the adjustment ring 7. Then, the lid receiving frame 10, the mortar and grout layer (not shown), the adjusting washer and the existing adjusting ring are removed, and the anchor bolt 8 is embedded on the top surface 6a of the inclined wall pipe 6 as necessary.

その後、斜壁管６の天面６ａ上に前述したと同様にアンカーボルト８と長穴13の位置合わせをして本実施形態の調整リング７を所望の方向にして載置する。 Thereafter, the anchor bolt 8 and the elongated hole 13 are aligned on the top surface 6a of the inclined wall tube 6 in the same manner as described above, and the adjusting ring 7 of this embodiment is placed in a desired direction.

更に、調整リング７上に図示しない調整ワッシャ、モルタルやグラウト層を介して蓋受枠10を載置し、斜壁管６の天面６ａに埋設されたアンカーボルト８にナット21を螺合締結して斜壁管６、調整リング７、図示しない調整ワッシャ及び蓋受枠10を一体的に相互に連結した後、掘削した土砂を埋め戻し、調整リング７の上部に舗装層22を施して復旧する。 Further, the lid receiving frame 10 is placed on the adjustment ring 7 via an adjustment washer, a mortar or a grout layer (not shown), and a nut 21 is screwed and fastened to the anchor bolt 8 embedded in the top surface 6a of the inclined wall tube 6. After the slant wall pipe 6, the adjustment ring 7, the adjustment washer (not shown) and the lid receiving frame 10 are integrally connected to each other, the excavated earth and sand are backfilled, and the pavement layer 22 is applied to the upper part of the adjustment ring 7 to restore it.

上記構成によれば、斜壁管６の上部に突出して設けられた複数のアンカーボルト８に調整リング７の平板部９に貫通して設けられた長穴13を挿通して該調整リング７の平板部９を斜壁管６の天面６ａ上に載置し、マンホール１の設置位置に応じてアンカーボルト８に長穴13を係合させながら調整リング７の平板部９の配置方向を円弧状の長穴13に沿って回転させて移動することが出来る。これにより平板部９に取り付けられる錘部14の配置角度を所望の方向に移動することが出来る。 According to the above configuration, the plurality of anchor bolts 8 projecting from the upper portion of the inclined wall tube 6 are inserted through the long holes 13 penetrating the flat plate portion 9 of the adjustment ring 7 so that the adjustment ring 7 The flat plate portion 9 is placed on the top surface 6a of the inclined wall tube 6 and the arrangement direction of the flat plate portion 9 of the adjustment ring 7 is circular while engaging the elongated hole 13 with the anchor bolt 8 according to the installation position of the manhole 1. It can be rotated and moved along the arc-shaped slot 13. Thereby, the arrangement | positioning angle of the weight part 14 attached to the flat plate part 9 can be moved to a desired direction.

また、連結部材16により調整リング７の平板部９と錘部14とを固定したり分離することが出来、錘部14が大きな重量を有する場合にも輸送や設置作業が容易に出来る。 Further, the flat plate portion 9 and the weight portion 14 of the adjustment ring 7 can be fixed or separated by the connecting member 16, and transportation and installation work can be facilitated even when the weight portion 14 has a large weight.

また、平板部９の外周縁に沿って設けた所定ピッチの係止部となる貫通穴９ｂの数に対応して長穴13の円弧状の長さを設定することにより、３６０度の所望の角度に錘部14を配置することが出来る。 In addition, by setting the arc-shaped length of the long hole 13 corresponding to the number of through holes 9b serving as locking portions having a predetermined pitch provided along the outer peripheral edge of the flat plate portion 9, a desired 360 ° is set. The weight portion 14 can be arranged at an angle.

また、調整リング７の平板部９と錘部14とを含む全体平面形状が直壁管の外径よりも大きな外形を有する方形状で構成されたことで、平面上で同じ面積を有する場合でも設置幅を小さくすることが出来、設置し得る路肩からの位置が制限されることもない。 Further, even when the entire planar shape including the flat plate portion 9 and the weight portion 14 of the adjustment ring 7 is formed in a rectangular shape having an outer shape larger than the outer diameter of the straight wall tube, even when the same area on the plane is obtained. The installation width can be reduced, and the position from the road shoulder that can be installed is not limited.

図５は調整リング７の一対の錘部14を平板部９を中心に折り曲げて道路23の変曲点に設置した様子を示す平面説明図である。前述したように、平板部９の外周縁近傍に円盤状の平板部９の円周中心を中心にして同一円周上に３０度ずつずれた位置に１２個設けられた貫通穴９ｂと、平板部９の円周中心を中心にして同一円周上に１２０度ずつずれた位置でその円周中心を中心として３０度の角度幅に対応する長さを有する３個の長穴13とを適宜組み合わせ、所望のアンカーボルト８に所望の長穴13を挿通して係合させた状態で斜壁管６上に載置される平板部９を所望の方向に回転させ、所望の貫通穴９ｂを選択して連結部材16を介して錘部14の延長方向を所望の方向に配置して固定することが出来る。これにより、図５に示すように、道路23の変曲点に応じて種々の角度で一対の錘部14を平板部９を中心に折曲した状態で設置することが容易に出来る。 FIG. 5 is an explanatory plan view showing a state in which the pair of weight portions 14 of the adjustment ring 7 are bent around the flat plate portion 9 and installed at the inflection point of the road 23. As described above, twelve through holes 9b are provided in the vicinity of the outer peripheral edge of the flat plate portion 9 at positions shifted by 30 degrees on the same circumference around the circumference center of the disc-shaped flat plate portion 9; Three elongated holes 13 having a length corresponding to an angular width of 30 degrees centered on the circumference center at a position shifted by 120 degrees on the same circumference around the circumference center of the portion 9 as appropriate The flat plate portion 9 placed on the inclined wall tube 6 is rotated in a desired direction in a state where the desired elongated bolt 13 is inserted and engaged with the desired anchor bolt 8, and the desired through hole 9b is formed. It is possible to select and fix the extending direction of the weight portion 14 in a desired direction via the connecting member 16. As a result, as shown in FIG. 5, it is possible to easily install the pair of weight parts 14 with the flat plate part 9 being bent at various angles according to the inflection point of the road 23.

本発明の活用例として、直壁管の上部に斜壁管、調整リング、蓋受枠及び開閉蓋を順に積層して構成したマンホールにおいて、地震時等に発生する液状化現象によりマンホールの浮き上がりを防止する浮上防止マンホールに適用出来る。 As an example of use of the present invention, in a manhole constructed by sequentially laminating a slanted wall tube, an adjustment ring, a lid receiving frame and an opening / closing lid on the top of a straight wall tube, the manhole is prevented from rising due to a liquefaction phenomenon that occurs during an earthquake, etc. Applicable to manholes to prevent levitation.

１ …マンホール
２ …地盤
３ …底版
４，５ …直壁管
６ …斜壁管
６ａ …天面
７ …調整リング
８ …アンカーボルト
９ …平板部
９ａ …開口部
９ｂ …貫通穴
10 …蓋受枠
11 …開閉蓋
12 …排水管
13 …長穴
14 …錘部
14ａ …ガイド溝部
15 …補強用鋼板
16 …連結部材
17 …インサートナット
18 …インサートナット
19 …固定ボルト
20 …固定ボルト
21 …ナット
22 …舗装層
23 …道路 DESCRIPTION OF SYMBOLS 1 ... Manhole 2 ... Ground 3 ... Bottom plate 4, 5 ... Straight wall pipe 6 ... Slanted wall pipe 6a ... Top surface 7 ... Adjustment ring 8 ... Anchor bolt 9 ... Flat plate part 9a ... Opening part 9b ... Through-hole
10… Lid receiving frame
11… Open / close lid
12… Drain pipe
13… slot
14… weight
14a ... Guide groove
15 ... Steel plate for reinforcement
16… Connecting member
17… Insert nut
18… Insert nut
19… Fixing bolt
20… Fixing bolt
21… Nut
22 Pavement layer
23… road

Claims

直壁管の上部に斜壁管、調整リング、蓋受枠及び開閉蓋を順に積層して構成した浮上防止マンホールにおいて、
前記斜壁管は、該斜壁管の上部に突出して設けられた複数のアンカーボルトを有し、
前記調整リングは、
前記斜壁管上に載置される平板部と、
前記平板部を貫通すると共に、円弧状で所定の長さを有し、前記アンカーボルトが移動可能に挿通される複数の長穴と、
前記平板部の外周縁に設けられ、該平板部の厚さよりも大きな厚さを有する錘部と、
を有し、
前記斜壁管上に載置される前記調整リングが前記平板部を貫通する長穴内に前記アンカーボルトが挿通された状態で該長穴に沿って回転可能に設けられ、
前記平板部と前記錘部とは連結部材を介して着脱可能に設けられ、
前記平板部は外形が円盤状で構成され、該平板部の外周縁に沿って前記連結部材を係止する複数の係止部が所定ピッチで設けられ、前記長穴の円弧状の長さは、３６０度を前記係止部の数で除した角度の範囲に設定されたことを特徴とする浮上防止マンホール。 In the anti-levitation manhole constructed by laminating a slant wall tube, adjustment ring, lid receiving frame and open / close lid in order on the top of the straight wall tube,
The slant wall pipe has a plurality of anchor bolts provided to protrude from the top of the slant wall pipe,
The adjustment ring is
A flat plate portion placed on the inclined wall tube;
A plurality of elongated holes penetrating the flat plate portion, having a predetermined length in an arc shape, and through which the anchor bolt is movably inserted;
A weight portion provided on an outer peripheral edge of the flat plate portion and having a thickness larger than the thickness of the flat plate portion;
Have
The adjustment ring placed on the inclined wall tube is rotatably provided along the elongated hole in a state where the anchor bolt is inserted into the elongated hole penetrating the flat plate portion ,
The flat plate portion and the weight portion are detachably provided via a connecting member,
The flat plate portion has a disc shape, and a plurality of locking portions for locking the connecting member are provided at a predetermined pitch along the outer peripheral edge of the flat plate portion, and the arc-shaped length of the long hole is An anti-levitation manhole characterized in that it is set to an angle range obtained by dividing 360 degrees by the number of the locking portions .

直壁管の上部に斜壁管、調整リング、蓋受枠及び開閉蓋を順に積層して構成した浮上防止マンホールにおいて、
前記斜壁管は、該斜壁管の上部に突出して設けられた複数のアンカーボルトを有し、
前記調整リングは、
前記斜壁管上に載置される平板部と、
前記平板部を貫通すると共に、円弧状で所定の長さを有し、前記アンカーボルトが移動可能に挿通される複数の長穴と、
前記平板部の外周縁に設けられ、該平板部の厚さよりも大きな厚さを有する錘部と、
を有し、
前記斜壁管上に載置される前記調整リングが前記平板部を貫通する長穴内に前記アンカーボルトが挿通された状態で該長穴に沿って回転可能に設けられ、
前記平板部と前記錘部とは連結部材を介して着脱可能に設けられ、
前記平板部の外周縁に前記連結部材を介して複数の前記錘部が着脱可能に設けられ、該複数の錘部は前記平板部を中心にして折曲した状態で配置されることを特徴とする浮上防止マンホール。 In the anti-levitation manhole constructed by laminating a slant wall tube, adjustment ring, lid receiving frame and open / close lid in order on the top of the straight wall tube ,
The slant wall pipe has a plurality of anchor bolts provided to protrude from the top of the slant wall pipe ,
The adjustment ring is
A flat plate portion placed on the inclined wall tube;
A plurality of elongated holes penetrating the flat plate portion, having a predetermined length in an arc shape, and through which the anchor bolt is movably inserted ;
A weight portion provided on an outer peripheral edge of the flat plate portion and having a thickness larger than the thickness of the flat plate portion ;
Have
The adjustment ring placed on the inclined wall tube is rotatably provided along the elongated hole in a state where the anchor bolt is inserted into the elongated hole penetrating the flat plate portion ,
The flat plate portion and the weight portion are detachably provided via a connecting member ,
A plurality of weight portions are detachably provided on the outer peripheral edge of the flat plate portion via the connecting member, and the plurality of weight portions are arranged in a state of being bent around the flat plate portion. floating on the prevention manhole you.

前記平板部及び錘部を含む全体平面形状が前記直壁管の外径よりも大きな外形を有する略方形状で形成されたことを特徴とする請求項１または請求項２に記載の浮上防止マンホール。 3. The levitation prevention manhole according to claim 1, wherein an entire planar shape including the flat plate portion and the weight portion is formed in a substantially rectangular shape having an outer shape larger than an outer diameter of the straight wall tube. .